Airedale hospital workers have voted to strike in anger at two-tier workforce structure.
Porters, domestics, catering and security staff will walk out over the fact they get worse terms and conditions than colleagues working at the same hospital.
The workers have been outsourced to AGH Solutions (AGHS), a wholly owned subsidiary of Airedale NHS Foundation Trust.
AGHS uses its subsidiary status to not honour the NHS Agenda for Change terms and conditions, including NHS pensions, sick pay rates, annual leave and Sunday working enhancements.
The workers want parity for everyone working across the trust.
More than 90 per cent of those who voted said they were ready to take industrial action which is scheduled for 12, 15 and 16 of September - with more dates set to follow.
Joe Wheatley, GMB Organiser, said:
"These workers are absolutely vital for Airedale Hospital to operate safely.
"It's outrageous that they are treated like second class citizens.
"These workers will walk out with heavy hearts - Airedale and AGHS must now recognise how important they are and give them the same pay, terms and conditions as the rest of the workforce."

Global Microsoft outage causes disruption to councils and schools in North Yorkshire
Two Keighley neighbours win £377,224 each in Postcode Lottery draw
Meet the family behind Drift - Skipton's new restaurant
Skipton MP backs Conservative welfare reform plan
Hundreds of donated spectacles handed over in Skipton
Royal Oak pub reopens under new management with plans for major changes
New Cats Protection superstore to open in Skipton this month
North Yorkshire Council cancels planning meetings amid new government rules
Skipton Repair Café volunteers fix 81 items in one day
Christmas toy appeal launches to help families across Skipton
Kex Gill A59 traffic restrictions expected to be lifted in early December
Talks continue over future of Settle dairy site
Work begins at former Gargrave care home earmarked for 16 affordable homes
Council accused of 'illusion of listening' over school transport consultation
North Yorkshire councillors to vote on next chief executive
Skipton keeps its place among Britain's 10 happiest places to live
Local care provider celebrates double win at Bradford Care Awards
Veterans selling poppies on Northern trains say support from passengers has been 'heartwarming'
Skipton MP raises concerns over proposed visitor levy and impact on rural tourism
£1million of Keighley Cougars stadium funding redirected to Cavendish Street improvements


